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Message-ID: <CA+DvKQ+hbMoWJdOuQB5n+eVF4ePf=kVuRiMbdtTUZ8ars4Pz4A@mail.gmail.com>
Date: Sat, 10 Mar 2018 18:44:35 -0500
From: Daniel Micay <danielmicay@...il.com>
To: Arend van Spriel <arend.vanspriel@...adcom.com>
Cc: Andreas Christoforou <andreaschristofo@...il.com>, Kees Cook <keescook@...omium.org>,
Kernel Hardening <kernel-hardening@...ts.openwall.com>,
QCA ath9k Development <ath9k-devel@....qualcomm.com>, Kalle Valo <kvalo@...eaurora.org>,
linux-wireless@...r.kernel.org, Netdev <netdev@...r.kernel.org>,
kernel list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drivers: net: wireless: ath: ath9: dfs: remove VLA usage
> Just wondering. Is this actually a VLA. FFT_NUM_SAMPLES was static const so
> not really going to show a lot of variation. This array will always have the
> same size on the stack.
The issue is that unlike in C++, a `static const` can't be used in a
constant expression in C. It's unclear why C is defined that way but
it's how it is and there isn't currently a GCC extension making more
things into constant expressions like C++.
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